大型科技廠接地系統之接地故障特性研究

A Study on the Ground Fault Characteristics of Grounding System in the Large High-Tech Factories

林南瑞(Nan-Jui Lin)

指導教授 ： 周至如

中原大學/工學院/電機工程研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300192

摘要

本研究以典型161kV供電之大型積體電路（IC）製造廠為對象，分別探討廠內不同電壓等級的配電系統發生接地故障時接地系統的特性，包括地電位湧昇(GPR)、步間電壓、接觸電壓及電磁場的分佈並據此評估對人員、設備、系統與電力品質的影響，最後檢討接地系統的缺失包括系統接地型式、各地網互連狀況、外線系統的接地線引入情形等相關缺失，並提出改善對策以改善電力品質。分析結果顯示，161kV系統發生接地故障最嚴重，其故障電流產生之GPR高達數萬伏特，會對人員與設備造成傷害，而其他電壓等級之接地故障相關的接地系統特性則對敏感系統影響較大。因此，本研究提出改善方法以提升接地系統對接地故障之防護能力，來提升供電品質。

關鍵字

接觸電壓 ； 接地故障 ； 地電位昇 ； 步間電壓

並列摘要

This thesis studies the characteristics of grounding system during ground faults on distribution systems with different voltage level of typical large integrated circuit (IC) manufactories fed with 161kV power. The ground potential rises (GPR), step voltages, touch voltages and electromagnetic fields are first analyzed. Based on these analysis results, the affections on personnel, equipments, systems and power quality can be assessed. Finally, The defects of grounding systems associated with the types of system grounding, the situations of interconnection between grids and the utility ground wires are discussed. Thus, the improvement strategies can be proposed to increase the power quality. The analysis results have shown that the GPR will rises to several ten thousand volts due to 161kV ground fault, which will threaten personal and equipments. The characteristics of grounding system respect to ground faults on other voltage level will influence the sensitive systems. For improving the protection performances of grounding system against the ground faults, the improving methods are proposed, which will also contribute to upgrading the power quality.

並列關鍵字

Touch Voltage ； Grounding Faults ； Ground Potential Rise ； Step Voltage

參考文獻

[26] 胡開泰，多地網大型接地系統接地故障之電磁特性研究，中原大學電機研究所碩士論文，民國九十年六月。

[66] 黃鈺倫，捷運系統主變電站接地系統之開關突波特性分析，中原大學電機研究所碩士論文，民國九十一年六月。

[2] R. B West, "Equipment Grounding for Reliable Ground Fault Protection in Electrical System below 600V", IEEE Trans. on Ind. Appl. Vol. IA-10, No.2, Mar./Apr. 1974.

[3] R. H. Kaufmann, "Important Functions by an Effective Equipment Grounding System", IEEE Trans. on Ind. Appl. Vol. IGA-6, No.6, pp. 545-552, Nov./Dec. 1970.

[4] F. Dawalibi, W. G. Finney, "Transmission Line Tower Grounding Performance In Non-Uniform Soil", IEEE Trans. on Power Apparatus and Systems, Vol. PAS-99, No.2, pp. 471-479, Mar./Apr. 1980.